JP7018253B2 - Column base hardware and how to build a column base structure using it - Google Patents

Description

The present invention uses a column base metal fitting in which the lower end portion of a column member in a building structure is joined to the lower end portion thereof and the tip end portion of an anchor bolt protruding upward from the foundation concrete is fastened, and the column base metal fitting thereof. It is related to the construction method of the pillar base structure that was used.

15 to 19 are views to be referred to for explaining the conventional column base metal fitting 6 and the method of constructing the conventional column base structure 2 using the conventional column base hardware 6.

FIG. 15 shows a column base structure 2 provided with a conventional column base metal fitting 6, and a lower end surface of a steel frame column 4 (column member) is joined to the upper surface 6c of the flat plate-shaped column base metal fitting 6 by welding. Was there. Further, the column base metal fitting 6 was provided above the foundation concrete 3 via the mortar 8.

Then, as shown in FIG. 15, the upper end portion of the anchor bolt 10 protruding upward through the mortar 8 from the foundation concrete 3 inserted the bolt insertion hole 6a (see FIG. 16) of the column base metal fitting 6. ..

Further, the female threaded portion of the nut member 12 is screwed to the male threaded portion formed at the upper end of the anchor bolt 10, so that the steel frame column 4 is erected on the foundation concrete 3 via the column base metal fitting 6. It was fixed (see, for example, FIGS. 11 and 12 of Patent Document 1).

Next, the procedure of the construction method of the column base structure 2 using the conventional column base hardware 6 will be described with reference to FIGS. 17 to 19.

In order to install the column base structure 2, first, four anchor bolts 10 are supported by a mount (not shown) and installed at a predetermined position, and then they are embedded in a formwork member (not shown). The foundation concrete 3 and the four anchor bolts 10 were installed by filling and solidifying the ready-mixed concrete (see FIG. 17).

Next, after the foundation concrete 3 was cured for a certain period of time and sufficiently solidified, the mortar member 13 was arranged on the upper surface of the foundation concrete 3 as shown in FIG. Since the height accuracy of the foundation concrete 3 is not high, the height of the column base metal fitting 6 was adjusted by using the mortar member 13.

Then, as shown in FIG. 18, the steel frame column 4 and the column base metal fitting 6 integrated before being carried into the installation site of the column base structure 2 are inserted into the bolt insertion hole 6a of the column base metal fitting 6 (see FIG. 16). It was placed on the mortar member 13 while penetrating the upper end portion of the anchor bolt 10.

The mortar member 13 does not support the lower surface of the column base hardware 6 over the entire surface, but as shown in FIG. 18, only the central portion of the lower surface of the column base hardware 6 (the central portion in the vertical and horizontal directions in FIG. 16). Was arranged to support.

Therefore, the mortar 8 is placed between the foundation concrete 3 and the column base metal fitting 6, and the steel frame is used until the lower surface of the column base metal fitting 6 is supported by the mortar 8 over the entire surface (see FIG. 15). The pillar 4 and the pillar base hardware 6 were swaying and in an unstable state.

Therefore, as shown in FIG. 19, by attaching one end of the wire 11 to the steel column 4 and pulling the other end of the wire 11, the steel column 4 is prevented from falling and tilted diagonally. The inclination of the steel column 4 was adjusted.

Japanese Patent No. 4006503

However, in the conventional method of constructing the column base structure 2 using the column base hardware 6, as shown in FIG. 19, the unstable steel column 4 is prevented from falling and the inclination of the steel column 4 is adjusted. However, there is a problem that the wire 11 cannot be used in a place where the installation site of the column base structure 2 is narrow.

Further, in the conventional method of constructing the column base structure 2 using the column base hardware 6, the inclination of the steel frame column 4 tilted diagonally is adjusted by pulling the wire 11, so that the inclination of the steel frame column 4 is adjusted. There was a problem that it was difficult to remove.

Therefore, in view of the above problems, the present invention enables the installation of the column base structure 2 in a narrow installation site, and also facilitates the tilt adjustment of the steel column 4, and the column base metal fitting 6 and the column base metal fitting 6 thereof. It is an object of the present invention to provide the construction method of the column base structure 2 using the above.

In order to solve the above problems, the pillar base hardware according to claim 1 of the present invention is
A plate-shaped column base hardware body having a substantially square planar shape, in which the lower end of the column member is fixed to the upper surface so as to stand on the upper surface,
The pillar base metal body on the outer peripheral surface of the pillar base metal body having a predetermined length dimension in the horizontal direction and a predetermined width dimension in the vertical direction along one side of the outer shape of the upper surface of the pillar base metal body. A nut member having a directly fixed female thread near the corners of the four corners of the
The male threaded portion is screwed to the female threaded portion of the nut member, and a bolt for supporting the main body of the column base hardware to which the lower end portion of the column member is fixed is provided.
The main body of the column base metal has a bolt insertion hole that protrudes upward from the upper surface of the foundation concrete and into which the upper end of an anchor bolt having a screw diameter larger than the screw diameter of the bolt is inserted.
The inner diameter of the female screw portion of the nut member is formed to be smaller than the inner diameter of the bolt insertion hole of the column base hardware body.
The tip end portion of the bolt penetrates the female screw portion of the nut member and protrudes below the lower surface of the column base metal body, and directly or directly on the upper surface of the foundation concrete arranged below the column base metal body. It is characterized in that the main body of the column base hardware is supported at a predetermined height position by indirect contact.

Further, the method for constructing the column base structure according to claim 2 of the present invention is as follows.
The method for constructing a column base structure including the column base hardware according to claim 1 .
It is characterized by having a step of screwing the bolt into the female screw portion and directly or indirectly contacting the tip end portion of the bolt with the upper surface of the foundation concrete arranged below the column base metal body. Is.

According to such a pillar base hardware of the present invention,
A plate-shaped column base hardware body having a substantially square planar shape, in which the lower end of the column member is fixed to the upper surface so as to stand on the upper surface,
The pillar base metal body on the outer peripheral surface of the pillar base metal body having a predetermined length dimension in the horizontal direction and a predetermined width dimension in the vertical direction along one side of the outer shape of the upper surface of the pillar base metal body. A nut member having a directly fixed female thread near the corners of the four corners of the
The male threaded portion is screwed to the female threaded portion of the nut member, and a bolt for supporting the main body of the column base hardware to which the lower end portion of the column member is fixed is provided.
The main body of the column base metal has a bolt insertion hole that protrudes upward from the upper surface of the foundation concrete and into which the upper end of an anchor bolt having a screw diameter larger than the screw diameter of the bolt is inserted.
The inner diameter of the female screw portion of the nut member is formed to be smaller than the inner diameter of the bolt insertion hole of the column base hardware body.
The tip end portion of the bolt penetrates the female screw portion of the nut member and protrudes below the lower surface of the column base metal body, and directly or directly on the upper surface of the foundation concrete arranged below the column base metal body. By indirectly contacting, the main body of the column base hardware is supported at a predetermined height position.
It is possible to install the column base structure in a narrow installation site, and it is possible to easily adjust the inclination of the column member.

Further, according to the construction method of the column base structure of the present invention as described above,
The method for constructing a column base structure including the column base hardware according to claim 1 .
By having a step of screwing the bolt into the female screw portion and bringing the tip end portion of the bolt into direct or indirect contact with the upper surface of the foundation concrete arranged below the column base metal body.
It is possible to install the column base structure in a narrow installation site, and it is possible to easily adjust the inclination of the column member.

It is a conceptual side view which shows the column base structure 20 using the column base metal fitting 25 which concerns on 1st Embodiment of this invention. It is a top view of the column base metal fitting 25 shown in FIG. It is a front view of the column base metal fitting 25 shown in FIG. FIG. 3 is a conceptual side view showing a state in which the mortar member 13 is installed on the upper surface of the foundation concrete 3 in the middle of the construction of the column base structure 20 shown in FIG. 1. It is a conceptual side view which shows the state in which the column base metal piece 25 is arranged on the upper surface of the mortar member 13 in the middle stage of the construction of the column base structure 20 shown in FIG. FIG. 5 is an enlarged side view showing an enlarged right side portion of the column base hardware 25 in the column base structure 20 of FIG. A conceptual aspect showing a state in which the column base metal 45 is arranged on the upper surface of the mortar member 13 in the middle of the construction of the column base structure 40 using the column base metal 45 according to the second embodiment of the present invention. It is a figure. An enlarged side view showing an enlarged right side portion of the column base hardware 45 in the column base structure 40 of FIG. 7. It is a top view of the column base metal fitting 45 shown in FIG. 7. It is a front view of the column base metal fitting 45 shown in FIG. A conceptual aspect showing a state in which the column base metal 65 is arranged on the upper surface of the mortar member 13 in the middle of the construction of the column base structure 60 using the column base metal 65 according to the third embodiment of the present invention. It is a figure. 11 is an enlarged side view showing an enlarged right side portion of the column base hardware 65 in the column base structure 60 of FIG. 11. It is a top view of the column base metal fitting 65 shown in FIG. It is a front view of the column base metal fitting 65 shown in FIG. It is a conceptual side view which shows the column base structure 2 using the conventional column base metal fitting 6. It is a top view of the column base metal fitting 6 shown in FIG. FIG. 15 is a conceptual side view showing a state in which the mortar member 13 is installed on the upper surface of the foundation concrete 3 in the middle of the construction of the column base structure 2 shown in FIG. FIG. 15 is a conceptual side view showing a state in which the column base hardware 6 is arranged on the upper surface of the mortar member 13 in the middle of the construction of the column base structure 2 shown in FIG. FIG. 15 is a conceptual side view showing a state in which a wire 11 is attached to a steel frame column 4 in the state of FIG. 18 in the middle of the construction of the column base structure 2 shown in FIG.

Hereinafter, the column base hardware according to the present invention and the mode for carrying out the method for constructing the column base structure using the column base hardware will be specifically described with reference to the drawings.

1 to 6 are views to be referred to for explaining a column base metal fitting 25 according to the first embodiment of the present invention and a method of constructing a column base structure 20 using the column base metal fitting 25. The same parts as those of the conventional column base metal fitting 6 and the column base structure 2 will be described with the same reference numerals, and the same configuration as the conventional column base metal fitting 6 and the column base structure 2 will be described in an overlapping manner. Shall be omitted except for some parts.

FIG. 1 shows a column base structure 20 provided with a column base metal fitting 25 according to the present embodiment, and the column base metal fitting 25 is provided above the foundation concrete 3 via a mortar 8.

Further, as shown in FIGS. 2 and 3, the column base metal fitting 25 is composed of a column base metal fitting main body 26, a nut member 27, and a bolt 28.

As shown in FIGS. 2 and 3, the column base metal body 26 is formed in a plate shape having a substantially square planar shape, and is a steel frame formed in a square cylinder shape having a length in the vertical direction in FIG. The lower end surface of the column 4 (column member) is in contact with the upper surface 26c of the column base metal body 26 and is joined by welding.

Further, as shown in FIGS. 2 and 3, nut members 27 are welded to the outer peripheral surfaces slightly behind the corners of the four corners of the column base hardware body 26 (center side in the vertical direction in FIG. 2). Bolts 28 (see FIG. 6) are screwed to the female screw holes of the four nut members 27, respectively.

Further, as shown in FIG. 1, the bolt 28 is inserted into each of the female screw holes of the four nut members 27 so that the lower end portion in the middle of the figure inserts the nut member 27 and contacts the upper surface of the foundation concrete 3. It is screwed in. Therefore, the four corners of the column base hardware body 26 are supported by bolts 28 (see FIGS. 5 and 6).

Then, as shown in FIG. 1, the upper end portions of the anchor bolts 10 that penetrate the mortar 8 from the foundation concrete 3 and project upward from the mortar 8 are formed at the four corners of the column base metal body 26, respectively. It is inserted through the bolt insertion hole 26a (see FIG. 2).

Further, the female threaded portion of the nut member 12 is screwed to the male threaded portion formed at the upper end of the anchor bolt 10 protruding upward from the upper surface 26c of the column base metal body 26, so that the steel frame column 4 is formed by the column base metal fitting. It is fixed so as to stand on the foundation concrete 3 via 25 and the mortar 8.

Next, the procedure of the construction method of the column base structure 20 provided with the column base hardware 25 will be described with reference to FIGS. 4 to 6.

In order to install the column base structure 20, first, four anchor bolts 10 are supported by a mount (not shown) and installed at a predetermined position, and then they are embedded in a formwork member (not shown). The foundation concrete 3 and the four anchor bolts 10 are installed by filling and solidifying the ready-mixed concrete (see FIG. 4).

Next, after the foundation concrete 3 is cured for a certain period of time to be sufficiently solidified, the mortar member 13 is placed on the upper surface of the foundation concrete 3 as shown in FIG. Since the height accuracy of the foundation concrete 3 is not high, the height of the column base metal body 26 is adjusted by using the mortar member 13.

Then, as shown in FIG. 5, the steel frame column 4 and the column base metal body 26 integrated before being carried into the installation site of the column base structure 20 are inserted into the bolt insertion holes 26a of the column base metal body 26 (FIG. 2). (See), the anchor bolt 10 is placed on the mortar member 13 while penetrating the upper end portion thereof.

The mortar member 13 does not support the lower surface of the column base metal body 26 over the entire surface, but as shown in FIG. 5, the central portion of the lower surface of the column base metal body 26 (the central portion in the vertical and horizontal directions in FIG. 2). ) Is arranged to support only.

Next, as shown in FIGS. 5 and 6, the female threads of the four nut members 27 are inserted so that the lower end of the bolt 28 is inserted into the nut member 27 and is in contact with the upper surface of the foundation concrete 3. Screw each of the holes.

In this way, if the central portion of the lower surface of the column base metal body 26 is only supported by the mortar member 13 (see FIG. 18), the steel column 4 and the column base metal 25 are in an unstable state. However, since the four corners of the column base metal body 26 are supported by the bolts 28, the steel column 4 and the column base metal 25 can stand on their own in a stable state.

Therefore, in the conventional method of constructing the column base structure 2, the wire 11 (see FIG. 19) is used to prevent the unstable steel column 4 from falling, but it relates to the present embodiment. In the construction method of the column base structure 20, it is not necessary to use the wire 11.

As described above, in the construction method of the column base structure 20 according to the present embodiment, the wire 11 is not used, and the column base hardware main body 26 is supported by the bolt 28 and the nut member 27. The column base structure 20 can be installed even in a narrow installation site.

Further, in the construction method of the column base structure 20, by adjusting the screwing amount of each of the four bolts 28 screwed to the nut member 27, the steel frame column 4 and the column base hardware tilted diagonally are adjusted. The inclination of the main body 26 can be adjusted.

That is, by adjusting the amount of screwing of the bolt 28 into the nut member 27 and changing the length dimension of the bolt 28 protruding below the lower surface of the column base metal body 26, the steel frame column 4 and the column base metal body are changed. The inclination of 26 can be adjusted.

Therefore, as compared with the case of adjusting the inclination of the slanted steel frame column 4 by pulling the wire 11 (see FIG. 19) as in the conventional method of constructing the column base structure 2, the present implementation is carried out. In the construction method of the column base structure 20 according to the form, the inclination of the steel frame column 4 can be easily adjusted.

As shown in FIGS. 5 and 6, the bolt 28 screwed to the nut member 27 has an anchor bolt 10 whose screw diameter is such that the bolt insertion hole 26a of the column base metal body 26 is inserted. It is smaller than the length dimension of the screw diameter.

By reducing the screw diameter of the bolt 28, when tightening the bolt 28 with a spanner or the like, a large axial force can be generated with a small torque, so that the force with which the bolt 28 presses the foundation concrete 3 (pillar base hardware body 26). The force to lift the bolt upward) can be generated with a small force.

By reducing the screw diameter of the bolt 28 in this way, the work of adjusting the inclination of the steel frame column 4 and the column base metal body 26 can be easily performed with a small force as compared with the case of using the bolt 28 having a large screw diameter. You can do it.

Then, after adjusting the height and inclination of the steel column 4 and the column base metal body 26, as shown in FIG. 1, the foundation concrete 3 and the column base metal body 26 are not removed from the nut member 27 without removing the bolt 28. A mortar 8 is placed between the columns so that the lower surface of the column base metal body 26 is supported by the mortar 8 over the entire surface.

Therefore, as described above, according to the column base hardware 25 according to the present embodiment and the method of constructing the column base structure 20 using the column base hardware 25, it is possible to install the column base structure 20 in a narrow installation site. At the same time, it is possible to easily adjust the inclination of the steel frame column 4.

7 to 10 are views to be referred to for explaining the column base metal fitting 45 according to the second embodiment of the present invention and the method of constructing the column base structure 40 using the column base metal fitting 45.

In the column base metal fitting 25 in the first embodiment, the nut member 27 (see FIG. 2) is joined to the outer peripheral surface of the column base metal fitting main body 26 by welding. The column base metal 45 is different from the column base metal 25 in the first embodiment in that a female screw hole 46b (see FIGS. 9 and 10) is formed in the outer peripheral portion of the column base metal body 46. It is a thing. Other configurations are the same as those of the column base metal fitting 25 according to the first embodiment.

That is, as shown in FIGS. 9 and 10, in the outer peripheral side (see FIG. 9) of the bolt insertion hole 46a at the four corners of the column base hardware main body 46, in the plate thickness direction (vertical direction in FIG. 10). Female screw holes 46b that penetrate are formed respectively. Bolts 48 are screwed to each of the four female screw holes 46b (see FIGS. 7 and 8).

Further, as shown in FIGS. 7 and 8, the bolt 48 is screwed into each of the four female screw holes 46b so that the lower end portion in the middle of the figure inserts the female screw hole 46b and contacts the upper surface of the foundation concrete 3. It is included. Therefore, the four corners of the column base hardware body 46 are supported by bolts 48, respectively.

Therefore, in the middle of the construction of the column base structure 40, if the central portion of the lower surface of the column base metal body 46 is only supported by the mortar member 13 (see FIG. 18), the steel column 4 and the column base metal 45 are formed. However, the four corners of the column base metal body 46 are supported by bolts 48, so that the steel column 4 and the column base metal 45 can stand on their own in a stable state. It has become like.

Therefore, in the conventional method of constructing the column base structure 2, the wire 11 (see FIG. 19) is used to prevent the unstable steel column 4 from falling, but it relates to the present embodiment. In the construction method of the column base structure 40, it is not necessary to use the wire 11.

As described above, in the construction method of the column base structure 40 according to the present embodiment, the wire 11 is not used, and the column base hardware main body 46 is supported by using the bolt 48 and the female screw hole 46b. The column base structure 40 can be installed even in a narrow installation site.

Further, in the construction method of the column base structure 40, by adjusting the screwing amount of each of the four bolts 48 screwed to the female screw holes 46b, the steel column 4 and the column base hardware tilted diagonally are adjusted. The inclination of the main body 46 can be adjusted.

Therefore, as compared with the case of adjusting the inclination of the slanted steel frame column 4 by pulling the wire 11 (see FIG. 19) as in the conventional method of constructing the column base structure 2, the present implementation is carried out. In the construction method of the column base structure 40 according to the form, the inclination of the steel frame column 4 can be easily adjusted.

Therefore, as described above, according to the method of constructing the column base metal 45 according to the present embodiment and the column base structure 40 using the same, the column base metal 25 according to the first embodiment. , And the method of constructing the column base structure 20 using the column base structure 40, the column base structure 40 can be installed in a narrow installation site, and the inclination of the steel column 4 can be easily adjusted.

11 to 14 are views to be referred to for explaining the column base metal fitting 65 according to the third embodiment of the present invention and the method of constructing the column base structure 60 using the column base metal fitting 65.

In the column base metal 25 according to the first embodiment, the nut member 27 is fixed to the outer peripheral surface of the column base metal body 26 by welding, but the column base metal 65 according to the present embodiment. In the first embodiment, the through hole 66b is formed in the outer peripheral portion of the column base metal body 66, and the nut member 64 is arranged so as to come into contact with the lower surface of the column base metal body 66. It is different from the pillar base hardware 25.

That is, as shown in FIGS. 13 and 14, in the outer peripheral side (see FIG. 13) of the bolt insertion hole 66a at the four corners of the column base hardware main body 66, in the plate thickness direction (vertical direction in FIG. 14). Through holes 66b that penetrate are formed respectively.

Further, as shown in FIGS. 11 and 12, at the four corners of the column base metal body 66, the nut member 64 has a nut member 64 whose upper surface contacts the lower surface of the column base metal body 66, and the female screw hole thereof becomes a through hole 66b. It is arranged so as to communicate.

Then, as shown in FIGS. 11 and 12, the bolt 68 is screwed into the female screw hole of the nut member 64 by inserting the four through holes 66b of the column base metal body 66, respectively. Other configurations are the same as those of the column base metal fitting 25 according to the first embodiment.

Further, as shown in FIGS. 11 and 12, the bolt 68 is screwed into the female screw hole of the nut member 64 so that the lower end portion in the middle of the figure inserts the nut member 64 and contacts the upper surface of the foundation concrete 3. ing.

In this way, the upper surface of the nut member 64 contacts the lower surface of the column base hardware body 66, and the tip end portion (lower end portion in the middle of FIG. 11) of the bolt 68 screwed to the nut member 64 contacts the upper surface of the foundation concrete 3. As a result, the four corners of the column base hardware body 66 are supported by the bolt 68 and the nut member 64.

Therefore, in the middle of the construction of the column base structure 60, if the central portion of the lower surface of the column base metal body 66 is only supported by the mortar member 13 (see FIG. 18), the steel column 4 and the column base metal 65 are formed. However, the four corners of the column base metal body 66 are supported by the bolt 68 and the nut member 64, respectively, so that the steel column 4 and the column base metal 65 stand on their own in a stable state. You can do it.

Therefore, in the conventional method of constructing the column base structure 2, the wire 11 (see FIG. 19) is used to prevent the unstable steel column 4 from falling, but it relates to the present embodiment. In the construction method of the column base structure 60, it is not necessary to use the wire 11.

As described above, in the construction method of the column base structure 60 according to the present embodiment, the wire 11 is not used, and the column base hardware main body 66 is supported by using the bolt 68 and the nut member 64. The column base structure 60 can be installed even in a narrow installation site.

Further, in the construction method of the column base structure 60, by adjusting the screwing amount of each of the four bolts 68 screwed to the nut member 64, the steel frame column 4 and the column base hardware tilted diagonally are adjusted. The inclination of the main body 66 can be adjusted.

Therefore, as compared with the case of adjusting the inclination of the slanted steel frame column 4 by pulling the wire 11 (see FIG. 19) as in the conventional method of constructing the column base structure 2, this implementation is carried out. In the construction method of the column base structure 60 according to the form, the inclination of the steel frame column 4 and the column base metal body 66 can be easily adjusted.

Therefore, as described above, according to the construction method of the column base metal fitting 65 according to the present embodiment and the column base structure 60 using the same, the column base metal fitting 25 according to the first embodiment. , And the method of constructing the column base structure 20 using the column base structure 60, the column base structure 60 can be installed in a narrow installation site, and the inclination of the steel column 4 can be easily adjusted.

The present invention is not limited to the first to third embodiments, and various modifications can be made as long as the object of the present invention can be achieved.

For example, in the column base hardware 25, 45, 65 according to the first to third embodiments and the method of constructing the column base structures 20, 40, 60 using them, the column base hardware main body 26, 46, Although the 66 is formed in a flat plate shape, it is not necessary to be limited to the column base metal having such a shape, and a column base metal having another shape may be used.

Further, in the construction method of the column base metal fitting 25 and the column base structure 20 using the column base metal fitting 25 according to the first embodiment, four nut members 27 are fixed to the outer peripheral surface of the column base metal fitting main body 26. Therefore, the column base hardware body 26 is supported by the four bolts 28, but it is not necessary to be limited to such a configuration.

Therefore, three or five or more nut members 27 are fixed to the outer peripheral surface of the column base hardware body 26, and the column base hardware body 26 is supported by three or five or more bolts 28. May be good.

Further, in the method of constructing the column base metal fitting 45 and the column base structure 40 using the column base metal fitting 45 according to the second embodiment, four female screw holes 46b are formed in the outer peripheral portion of the column base metal fitting main body 46. Therefore, the column base hardware body 46 is supported by the four bolts 48, but it is not necessary to be limited to such a configuration.

Therefore, three or five or more female screw holes 46b are formed in the outer peripheral portion of the column base hardware body 46, and the column base hardware body 46 is supported by three or five or more bolts 48. May be good.

Further, in the method of constructing the column base metal fitting 65 and the column base structure 60 using the column base metal fitting 65 according to the third embodiment, four through holes 66b are formed in the outer peripheral portion of the column base metal fitting main body 66. Therefore, the column base hardware body 66 is supported by the four nut members 64 and the four bolts 68, but it is not necessary to be limited to such a configuration.

Therefore, three or five or more through holes 66b are formed in the outer peripheral portion of the column base hardware main body 66, and three or five or more nut members 64 and three or five or more bolts 68 are used. The column base hardware body 66 may be supported by the support.

Further, in the method of constructing the column base hardware 25, 45, 65 according to the first to third embodiments and the column base structures 20, 40, 60 using them, FIGS. 6, 8 and 12 are shown. As described above, bolts 28, 48, 68 having a head have been used, but all screws (screws without a head) may be used.

Further, in the column base hardware 25, 45, 65 according to the first to third embodiments and the method of constructing the column base structures 20, 40, 60 using them, the column base hardware main body 26, 46, One bolt insertion hole 26a, 46a, 66a (see FIGS. 2, 9 and 13) was formed at each of the four corners of 66 (see FIGS. 2, 9 and 13), but the configuration is not limited to this.

For example, three bolt insertion holes 26a, 46a, 66a (12 in total) may be formed at the four corners of the column base hardware main body 26, 46, 66.

Further, in the column base hardware 25, 45, 65 according to the first to third embodiments and the method of constructing the column base structures 20, 40, 60 using them, the column base hardware main body 26, 46, Although the mortar member 13 was used for adjusting the height of 66, other members such as an iron plate may be used.

Further, in the method of constructing the column base hardware 25, 45, 65 according to the first to third embodiments and the column base structures 20, 40, 60 using them, FIGS. 6, 8 and 12 are shown. As described above, the tips of the bolts 28, 48, and 68 were screwed to the nut member 27, the female screw hole 46b, and the nut member 64 so as to contact (directly contact) the upper surface of the foundation concrete 3. , It is not necessary to be limited to such a configuration (process).

For example, another member such as a plate is arranged between the tip of the bolt 28, 48, 68 and the upper surface of the foundation concrete 3, and the tip of the bolt 28, 48, 68 and the foundation concrete 3 form another member. The structure (process) may be such that the contact (indirect contact) is made through the concrete.

2 Pillar base structure 3 Foundation concrete 4 Steel pillar 6 Pillar base hardware 6a Bolt insertion hole 6c Top surface 8 Mortal 10 Anchor bolt 11 Wire 12 Nut member 13 Mortal member 20 Pillar base structure 25 Pillar base hardware 26 Pillar base metal body 26a Bolt insertion hole 26c Top surface 27 Nut member 28 Bolt 40 Pillar base structure 45 Pillar base hardware 46 Pillar base hardware body 46a Bolt insertion hole 46b Female screw hole 48 Bolt 60 Pillar base structure 64 Nut member 65 Pillar base hardware 66 Pillar base hardware body 66a Bolt insertion hole 66b Through hole 68 bolt

Claims (2)

A plate-shaped column base hardware body having a substantially square planar shape, in which the lower end of the column member is fixed to the upper surface so as to stand on the upper surface,
The pillar base metal body on the outer peripheral surface of the pillar base metal body having a predetermined length dimension in the horizontal direction and a predetermined width dimension in the vertical direction along one side of the outer shape of the upper surface of the pillar base metal body. A nut member having a directly fixed female thread near the corners of the four corners of the
The male threaded portion is screwed to the female threaded portion of the nut member, and a bolt for supporting the main body of the column base hardware to which the lower end portion of the column member is fixed is provided.
The main body of the column base metal has a bolt insertion hole that protrudes upward from the upper surface of the foundation concrete and into which the upper end of an anchor bolt having a screw diameter larger than the screw diameter of the bolt is inserted.
The inner diameter of the female screw portion of the nut member is formed to be smaller than the inner diameter of the bolt insertion hole of the column base hardware body.
The tip portion of the bolt protrudes below the lower surface of the column base metal body through the female screw portion of the nut member, and directly or directly on the upper surface of the foundation concrete arranged below the column base metal body. A column base hardware characterized in that the main body of the column base hardware is supported at a predetermined height position by indirect contact. The method for constructing a column base structure including the column base hardware according to claim 1.
A column characterized by having a step of screwing the bolt into the female screw portion and directly or indirectly contacting the tip end portion of the bolt with the upper surface of the foundation concrete arranged below the column base metal body. How to build a leg structure.

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